Comparison between dry heat sterilization and moist heat sterilization?

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Mechanism of killing by dry heat
  • Dry heat kills the organisms by destructive oxidation of essential cell constituents
  • Killing of the most resistant spores by dry heat requires a temperature of about 160 °C for 60 minutes
  • Dry heat is employed for glassware; syringes, metal instruments and paper wrapped goods, which are not spoiled by high temperatures.
  • It is also used for anhydrous fats, oils and powders that are impermeable to moisture.


Mechanism of killing by moist heat
  • Moist heat kills the organisms by coagulating and denaturing their enzymes and structural protein.
  • Sterilization by moist heat of the most resistant spores generally requires 121 °C for 15-30 minutes.
  • Moist heat is used for the sterilization of culture media, and all other materials through which steam can penetrate
  • Moist heat is more effective than dry heat
  • Sterilization can be done at lower temperatures in a given time at a shorter duration at the same temperature.
  • upon heating wet proteins release free -sh groups and form smaller peptide chains which in turn form new complexes different from the orignal protein molecules
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What is a sterilizer?

A steriliser is something that destroys microorganisms in or onsomething, usually by bringing to a high temperature with steam,dry heat, or boiling liquid.

What is the definition of dry heat sterilization?

Dry Heat Sterilization by Devansh . Dry-heat sterilization is generally a less complicated process than steam sterilization; it is, however, relatively slow and requires higher temperatures and/or longer exposure times. This is because of the fact that microbial lethality is lower with dry heat t ( Full Answer )

What is sterilization?

Sterilization is process of eliminating or killing all the microbes in a food by heating, irradiating, etc.It is also the method by which all contaminations are completely destroyed.. Sterilization is the elimination of microbiological organisms. Thisis also known as microbiology.

What is sterile?

Answer . Two meanings to sterile, that I know of.. 1. Completely clean, sanitized, free of bacteria. Must be done by boiling, disinfecting etc.. 2. Unable to reproduce due to some abnormality or deliberate modification of reproductive organs (when you talk about 'sterilising' a pet, that means ( Full Answer )

What is Sterilizers?

sterilizers . Sterilizers are the instruments that are used to kill or eliminate transmissible substances(bacteria,fungi etc) on any surface or object by the application of heat, irradiation etc .. The process is called sterilization

What is sterility?

If you are female it means that you cannot get pregnant and if you are male it means that you cannot get someone pregnant.

What are the Advantages and disadvantages of heat sterilization on medical equipment?

They are different sterilization methods for medical instruments, consumables, devices and Implantable devices. Depending on the nature of the product to sterilize is the method used. Sterilization can be achieved through application of heat, chemicals, irradiation, high Pressure or filtration. Heat ( Full Answer )

What is the difference between pasteurization and sterilization?

The pasteurization is carried out for a prolonged time at around 170°F and is supposed to kill only heat susceptible organisms and their spores, while sterilization works at a temperature of 250°F and is supposed to kill all organisms.

What is the rationale in choosing moist vs dry heat packs for skeletal pains?

Water conducts heat better than air. Likewise, moist air also conducts heat better than dry air (as anyone who's been outside on a hot, humid day knows very well). That's the rationale.. The reality is that, in the case of compresses, there's very little difference. The patient sweats. Don't waste ( Full Answer )

What is the difference between sterile distilled water and sterile water?

Sterile distilled water has no microbial contamination and is distilled and and sterile water merely has no microbial contamination. Distillation is the process of separation by heating a liquid until it evaporates and then condensing the steam back into a purer liquid as all contamination remains ( Full Answer )

What are Differences between dry sterilizer and autoclave sterilizer?

Dry sterilizers are now in most countries considered junk, most health inspection agencies are requiring facilities upgrade to steam autoclaves.Stream autoclaves use the high temperature and steam pressure to kill spores and bacterial growth on all reusable equipment. To ensure the sterilizer is fun ( Full Answer )

How can you do sterilization?

There are several methods of sterilization, including the use ofchemicals. Heat can also be used to sterilize some objects.

Does heat make you sterile?

The production of healthy sperm requires a cool environment, about 3 or 4 degrees C lower than core temperature. Thus keeping the testicles warm will result in malformed batched or sperm that will be next to usless fertily. But this will only affect the batched produced when the testicles are warm a ( Full Answer )

If a heat emergency patient has hot skin whether moist or dry?

Somebody had better cool them down fast because they can cook themselves if the temperature is high enough. and you cool them down with an ice bath. Even though the ice stings at first touch it will cool them down. If it doesn't cool down or re heats itself then go to an emergency room. O_O

What are the differences between pasteurization and sterilization?

Sterilization is used for preventing the spoilage of food. Food is sterilized by exposing it to light temperature of 120 C to 126 C under pressure for 12-90min. Food and other thing are made free from disease causing organism for example bacteria through this process. Milk is pasteurized by heating ( Full Answer )

Difference between sterilization and disinfection?

disinfectant gets most of the viruses and bacteria off of something, while complete sterilization is there is absolutely NOTHING on that object. period. it is generally for surgical use that people sterilize rather than disinfect!

Dry heat cooking and moist heat cooking?

Dry heat cooking is by applying heat directly without using any liquid such as water or wine. However, for Moist heat cooking, it is cooking food use by either hot water or steam. These methods include poaching, simmering, and steaming. It should also be noted that any cooking method using oil (deep ( Full Answer )

What is the difference between sterilize and disinfect?

Disinfection and sterilization are both decontamination processes.Disinfection is the process of eliminating or reducing harmfulmicroorganisms from inanimate objects and surfaces. Sterilizationis the process of killing all microorganisms.

What is the difference between wet heat an dry heat systems?

Wet heat you get in a sauna bath where there is hot rocks and water is poured over to let steam into the air. Dry heat there is very little moisture in the air. Wet heat can feel hotter but can be easier to breathe in than dry heat.

What is the difference between sanitization and sterilization?

Sanitizing is the process of killing and/or removing bacteria and microbes with chemicals. The effectiveness of sanitizing is determined by the chemical(s) used. For example: Plain water is an effective neutral sanitizer for removing most microbes from surfaces. However, it is not effective for ( Full Answer )

What is the difference between impotence and sterility?

Impotence is the inability of a male to perform the act of intercourse, through either mental, or most likely, biological means. Sterility is the lack of enough viable sperm to impregnate the female. Sterile males usually can perform intercourse, however.

Why is it necessary to use bacteriologic controls to monitor heat sterilization technique?

Such preparations contain viable endospores dried on paper strips or suspended in nutrient broth within a sealed ampule. When appropriately placed within an autoclave load, endospores controls can indicate weather the autoclave is operating efficiently and mechanically; individual item packing is co ( Full Answer )

Is lyophilization a method of dry heat sterilization?

If we limit our discussion to the enveloped viruses HIV, HCV and HBV, then lyophilization is a sterilization method as explained in my recent article [Cell Tissue Bank (2011) 12:99-104]. Desiccation of the lipid envelops inactivates these viruses.

What is the difference between castration and sterilization?

Castration is the removal of the testicles from a male animal or person, which is a form of sterilization because sperm can no longer be produced. Sterilization of a male can be accomplished without castration, for example by vasectomy, which is cutting and cauterizing the tubes that carry sperm fro ( Full Answer )

What is difference between dry heat and moist heat?

Dry heat is the absolute substance temperature without accounting for the modulating effects of water vapor in the substance. Moist heat is the relative substance temperature when accounting for the modulating effects of water vapor.